STMicroelectronics · Discrete semiconductors
BUL128D-B
TRANS NPN 400V 4A TO220
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BUL128D-B specifications
Recorded source facts. Missing values are kept explicit; verify the exact manufacturer document before design approval.
| Manufacturer | STMicroelectronics |
|---|---|
| Ordering code | BUL128D-B |
| Family | Discrete semiconductors |
| Package | TO-220-3 |
| Product Status | Active |
| Transistor Type | NPN |
| Current - Collector (Ic) (Max) | 4 A |
| Voltage - Collector Emitter Breakdown (Max) | 400 V |
| Vce Saturation (Max) @ Ib, Ic | 500mV @ 1A, 4A |
| Current - Collector Cutoff (Max) | 250µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 12 @ 2A, 5V |
| Power - Max | 70 W |
| Frequency - Transition | Not provided in source |
| Operating Temperature | 150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-220-3 |
| Supplier Device Package | TO-220 |
Documents and evidence
BUL128D-B ↗Catalog sources
www.ic-components.com · BUL128D-B ↗Source directory identity match; source detail pending. Specifications remain from existing catalog.
Before sourcing BUL128D-B
- Identify the firmware and board baseline
- Check flash, RAM and required peripherals
- Review pin assignment and supply limits
- Keep the full temperature and package suffix
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